US1661023A - Sewing machine - Google Patents

Description

Feb. 28, 1928.l Y

v. TURNER ET A1.

SEWING MACHINE Filed April 13, 1927 N2 Sheets-Sme*v 1 giran www. m@ L n Feb. 28, 1928.

V. TURNER ET AL SEWING MACHINE Filed Abril 13, 1927 2 Sheetssheef, 2

, Btwn/Onsfm1/TW Patented Feb. 28, 1928.

UNITED STATES j 1,661,023 ,PATENT oFFICE.

VERNON TURNER `ANI) ALBERTI` HENRY Lomax, or LowERERoUGH'roN, MAN- CHESTER, ENGLAND.

SEWING MACHINE.

Application filed April 13, 1927, Serial No. `183,l88,`and in Great Britain February` 2, 1926.

This invention relates to sewin machines of the kind usually employed or sewing together the ends or selvedges or lists of pieces of fabricv preparatory to subjecting them to industrial processes, such as bleachj ing, milling and so forth.

In previously p the said kind it was only possible to sew the ends or selvedges or lists together by bring- 1 ing the parts together so that both the edges thereof lay to one andthe same` side of the stitching, this formof joint being usually j known as i a sewn-type seam. Seems 1n which the edges of the fabric overlapped, 1usually known as pasted-type seams` could only be obtained by `pastingthe overlapping edges together, `or sewing them by hand. The pastedtype seam possesses considerable advantages over the sewn-type seam.

2 The object of our` invention is to enable a pasted-type seam to beproduced sew ing on a sewing machine. Previous to our invention it has been preposed in a sewing machine to provide a horlzontal shaft'connected at right angles by bevel gearing to a cross shaft which actuates the looper and driving throughworm gear-V ing two pairs of fianged pulleys carrying and driving two endless bands of wire fillet- :o ing which served whilst sewing to feed the i lfabric, towards theV supportedend of the needle arm ina direction parallel tothe said horizontal shaft.`

. According to our invention the Yfeed mechas anism of the sewing machine` consists of feed chains mounted on sprocket wheels which are rotated "tocause the fabric during sew- `ing to vtravel away from the supported end of the `arm ofthe machine along a path lying in a plane which is paralleler at an angle othery than a right angle to the said arm.` j The arm and feed mechanism are both supported at one end` only on a pillar Vo1' pillars or bracket, stand, foot or bench or` the equivalent.

The feed chains are'supported by the feed table at either side of the needle hole or` holes in the said table. i 80 The feed chains extend right up to the supported end ofthe needle arm.

In the` accompanying drawings-4- Figure 1 is a side view in sectionof a i chain stitch sewing machine.

known ASewing machines of j -Figure2 is a plan View with a part broken away, and

Figure 3 an end view, partly in section and withparts broken away.` 1

Figure 4f is a fragmentary, detached side view which illustrates certain details.

Figure is a detached side view and- Figure 6 a detached front view of parts of the sewing mechanism and illustrates a i modification. j

Figure' is a fragmentary side view, partly in section, of. a part of the feed mechanism shown in Figures 1 to 4.

Referring to the drawings, in the construction shown therein, as appliedby way of example `to a chain stitch sewing machine, ywe provide ,i a vertical supporting pillar 1 which has mountedon its upper end a member 2, set screws 3 being. provided on themember 2 to secure the said member to the pillar 1. Thernember 1 hasan arm 4 projecting from its upper` part. The length of the arm 4. is preferably equal in length to or substantially equal in length to the width of the pieces of cloth to `be sewn, but may be of.l eonsiderably less length than the said width. i V j i The member 2 is provided with a bracket 5 of substantially U-shape in cross section and `tional support advisable orpermissible. A

cloth supporting `table 7 has two depending plate-.like extensions `8 whichV serve to sup` port the table 17 i and other parts and are secured 4by bolts 9Jto the support` 5; The extensions are displaced to one side of the centre line of the arm 4.` i i,

Two endless chains-10 provided with pins 11 slide in grooves 12 provided in the table 7 and run on sprocket wheels 13 rotatably mounted in the support 5 and on guide pul leys 14 rotatably and adjustably mounted between the `extensions 8. The sprocket wheels 13 are both adapted to be intermittently turned by means of a ratchet wheel `l5 mounted` on a shaft 16 on which the wheels 13 are mounted. The shaft lcarries a stirrup'17provided with a` spring controlled pawl 18 adapted to co-operate with the ratchetwheeli The stirrup 17 is formed with an arm 19 by means of which itcan be oscillated by a lever 20 which is adjustably connected at 19a to the arm 19 and is operated by an eccentric 21 provided on a shaft 22. A back pawl 44 is mounted on a stud 44a provided on the support 5, to act on the ratchet wheel 15.

The shaft 22 is rotated by means of a pair of bevel gears 23 one of which is provided on a shaft 24 carried by the men'lbcr 2 and a bracket 25 on one of the extensions 8. The shaft 24 is provided with a bevel pinion 26 meshingl with a bevel wheel 27 mounted by means of a stud 28 on 'the member 2 and adapted to be rotated by hand and/or power.

The bevel wheel 27 .also drives a bevel pinion 29 provided on a shaft 30 which is mounted in the arm 4 and drives a pair of bevel gears 31 one of which is provided on a shaft 32 which drives the needle bar 33 which is mounted in an off-set head 34 provided on the arm 4.

The counter shaft 24 also serves to drive the looping mechanism by means of a pinion 35, see particularly Figure 4, mounted on the shaft 22 and meshing with a pinion 36 mounted on a thickened part 37 of` one of the extensions 8. The pinion 36 meshes with a pinion 38 provided on the shaft 39 of the tappet 40 of the usual hook and tappet mechanism, the said shaft being supported at one end in the bracket 25.

A stripping plate 41 having slots 42 for the passage of the lpins 11 is attached by brackets 43 to the support 5. This plate is not shown in Figure 3.

It will be appreciated that in lieu of a single pillar 1, two` or more pillars maybe provided and that in lieu of a pillaror pillars to support the member 2, a stand, pedestal, bracket or the like may be provided or the member itself may be provided with a suitable foot for example for attachment to the edge of a bench or the like. Furthermore where the'length of the arm 4 renders it advisable, the member may eX- tend Vupwardly beyond the arm and one or 'more tie rods be provided between the eX- tended part of the saidrmember and the arm. Furthermore spiral or other suitable gearing may be employed in lieu of the hereinbefore described bevel gearing and any suitable number of feed chains 10 from one upwards may be provided.

In operation, assuming the ends 45 and 46 of two pieces of cloth, of which fragiments are shown in Figure 2 for the purpose of illustration only, are to be sewn together, the end 45 oflo'ne piece is placed on the pins ll'of the chains 10 from one side of the table 7 and the end 46 of the other piece is placed on the vpins 11 from the. other side of the table 7, the ends 45 and 46 being thereby caused to overlap. The machine is conveniently lie on the table 7 is placed on the pins 11 and sewn together. The remaining part of the ends hangdown on either side of the table and when sewing of the first part is completed, the other or another part of the said ends is placed on the pins 11 for sewing together. This is repeated as often as is necessary to complete the sewing of the ends together. Thus it will be i appreciated that without bunching the cloth any widths of cloth can be sewn together. if itis desired to produce a similar seam for attaching the two selvedges or lists of a piece of cloth together the said selvedges or lists are placed on the feed pins 11 in a similar manner to the ends of two pieces, fresh parts of the selvedges or lists being placed on the pins as stitching proceeds. Here again owing to the formation of our improved machine no diihculty is experienced in producing a pasted-type seam along the whole length of the piece and without bunching of the cloth.

For the purpose of obtaining two rows i of stitches and therefore producing a stronger seam, the needle bar may be provided with two needles 51, see Figures 5 and 6, and the looping mechanism be provided with two looping hooks 47, means such as a set screw 48 acting to force the two hooks apart and set screws 49 and^50 acting to draw the two hooks together, being provided for adjustingthe second hook 47vrelative to the iirst hook 47. c We claim 'K y A sewing machine of ythe `her'einbefore Vspecified kind comprisingv an arm support'- ing the needle bar mechanism, a needle bar *y off set to one side of the saidarm, and a` table carrying two feed chains both olf set to one side of the said arm and arranged to feed fabric in the general direction of the said arm away from the supported end of the said arm. Y Y

In testimony whereof, we have signed our names to this specification at` Manchester in the county of Laneaster,England, this 30th day of March, 1927. n

vERNoN TURNER.v rALBERI" HENRY LOMAX.

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